-6x2 -6x +12 = 0
ax2 bx c = 0
a = -6
b = -6
c = 12
Δ = b2-4ac
Δ = -6² - (4 * -6 * 12)
Δ = 36 - (4*-72)
Δ = 36 - (-288)
Δ = 324 Δ > 0
-6x2-6x+12=0
x = -b ∓ √Δ 2a
x' = 6 - √324 2*-6 = 6 - 18.0 -12 = -12.0 -12 = 1.0
x" = 6 + √324 2*-6 = 6 + 18.0 -12 = 24.0 -12 = -2.0
x' = 36.0
x" = -72.0
S = {x ∈ R / x' = 36.0, x" = -72.0 }